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Add 21/54 and 49/56

21/54 + 49/56 is 91/72.

Steps for adding fractions

  1. Find the least common denominator or LCM of the two denominators:
    LCM of 54 and 56 is 1512

    Next, find the equivalent fraction of both fractional numbers with denominator 1512
  2. For the 1st fraction, since 54 × 28 = 1512,
    21/54 = 21 × 28/54 × 28 = 588/1512
  3. Likewise, for the 2nd fraction, since 56 × 27 = 1512,
    49/56 = 49 × 27/56 × 27 = 1323/1512
  4. Add the two like fractions:
    588/1512 + 1323/1512 = 588 + 1323/1512 = 1911/1512
  5. 1911/1512 simplified gives 91/72
  6. So, 21/54 + 49/56 = 91/72
    In mixed form: 119/72

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